Power Platform Community Forum Thread Details

Action 'Respond_to_a_PowerApp_or_flow' failed

Hello,
after the sucessful run of desktop flow, triggered by automated child flow, the error ocurtes to set the "Action 'Respond_to_a_PowerApp_or_flow' failed". If i trigger the child flow manualy with all the paramters, the flow run sucessfull and the "Respond to flow" works ans set the time stamp.
Any Idea where the error comes from and to solve it?
Error Details:
Unable to process template language expressions in action 'Respond_to_a_PowerApp_or_flow' inputs at line '0' and column '0': 'The template language expression 'triggerOutputs()['headers']['x-ms-user-timestamp']' cannot be evaluated because property 'x-ms-user-timestamp' doesn't exist, available properties are 'Accept-Language, User-Agent, x-ms-workflow-id, x-ms-workflow-version, x-ms-workflow-name, x-ms-workflow-system-id, x-ms-workflow-run-id, x-ms-workflow-run-tracking-id, x-ms-workflow-operation-name, x-ms-execution-location, x-ms-workflow-subscription-id, x-ms-workflow-resourcegroup-name, x-ms-tracking-id, x-ms-correlation-id, x-ms-client-request-id, x-ms-client-tracking-id, x-ms-action-tracking-id, x-ms-activity-vector, Content-Type, Content-Length'. Please see https://aka.ms/logicexpressions for usage details.'.